CAJ | 학술논문

为改善聚四氟乙烯(PTFE)复合材料的性能,将青铜粉(Bronze)、聚酰亚胺(PI)填充PTFE材料对其进行改性,采用冷压成型、自由烧结工艺分别制备了2种固体润滑剂,在改装的M-2000型摩擦磨损试验机上考察了2种固体润滑剂的二次转移性能:用扫描电子显微镜对上试样的磨损表面进行观察和分析.结果表明:PTFE复合材料作固体润滑剂所形成的二次转移能够改善体系的摩擦学性能,填料的加入增强了PTFE复合材料转移膜与底材的结合强度,起到了保护金属表面的作用;PTFE/Bronze比PTFE/PI的复合材料更适宜作润滑源使用.
위개선취사불을희(PTFE)복합재료적성능,장청동분(Bronze)、취선아알(PI)전충PTFE재료대기진행개성,채용냉압성형、자유소결공예분별제비료2충고체윤활제,재개장적M-2000형마찰마손시험궤상고찰료2충고체윤활제적이차전이성능:용소묘전자현미경대상시양적마손표면진행관찰화분석.결과표명:PTFE복합재료작고체윤활제소형성적이차전이능구개선체계적마찰학성능,전료적가입증강료PTFE복합재료전이막여저재적결합강도,기도료보호금속표면적작용;PTFE/Bronze비PTFE/PI적복합재료경괄의작윤활원사용.
Polytetrafluoroethylene (PTFE) composites filled with polyimide (PI) and bronze were prepared by compression molding and sintering. The friction and wear behavior as well as second tribological transper of the filled PTFE composites under dry sliding conditions was evaluated using a reequipped M-2000 tribometer. The worn surfaces of the composites were examined by means of scanning electron microscopy. Results show that under the given conditions, the filled PTFE composites are able to form transfer film on the sliding surface of the counterpart and hence decrease the friction and wear of the frictional pair. At the same time, the two kinds of fillers were able to increase the adhesion of the transfer film to substrate and hence effectively protected the sliding metallic surfaces. And the PTFE/bronze composites were superior to PTFE/PI composites in terms of the friction and wear behavior.